/* ============================================
   Design Tokens - The Trenches Brand System
   ============================================

   A minimal, purpose-driven token system.
   KISS: Only tokens that are actually used.
   ============================================ */

:root {
  /* Typography - Font Stacks */
  --font-display: 'Playfair Display', Georgia, serif;
  --font-headline: 'Fraunces', Georgia, serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Typography - Weights (only what we use) */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Typography - Scale */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  --text-7xl: 4.5rem;

  /* Typography - Line Heights */
  --leading-none: 1;
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 1.75;

  /* Typography - Letter Spacing */
  --tracking-tight: -0.025em;
  --tracking-wide: 0.025em;
  --tracking-widest: 0.1em;

  /* Spacing - 4px base scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Layout */
  --content-width: 680px;
  --wide-width: 920px;
  --max-width: 1200px;
  --header-height: 64px;

  /* Responsive Container Padding */
  --container-padding: var(--space-6);

  /* Breakpoints (for reference - use in media queries)
   * --bp-sm: 640px   - Mobile landscape
   * --bp-md: 768px   - Tablet
   * --bp-lg: 1024px  - Desktop
   * --bp-xl: 1280px  - Wide desktop
   */

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.25s ease;
  --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);

  /* Z-Index */
  --z-sticky: 200;
  --z-fixed: 300;
  --z-tooltip: 600;
}

/* ============================================
   Dark Theme (Default)
   ============================================ */
:root {
  /* Surfaces */
  --bg-primary: #09090b;
  --bg-secondary: #0f0f12;
  --bg-tertiary: #16161a;
  --bg-card: #0f1113;
  --bg-elevated: #1a1a1f;
  --bg-code: #0d0d10;

  /* Text Hierarchy */
  --text-primary: #f4f4f5;
  --text-secondary: rgba(244, 244, 245, 0.72);
  --text-tertiary: rgba(244, 244, 245, 0.60); /* Improved from 0.52 for WCAG AA contrast */
  --text-muted: rgba(244, 244, 245, 0.36);

  /* Brand - Primary (Warm Orange) */
  --accent-primary: #fb923c;
  --accent-primary-hover: #f97316;
  --accent-primary-muted: rgba(251, 146, 60, 0.15);
  --accent-primary-glow: rgba(251, 146, 60, 0.1);

  /* Brand - Secondary (Cool Blue) */
  --accent-cool: #60a5fa;
  --accent-cool-hover: #3b82f6;
  --accent-cool-muted: rgba(96, 165, 250, 0.15);

  /* Accent - Violet */
  --accent-violet: #a78bfa;
  --accent-violet-muted: rgba(167, 139, 250, 0.15);
  --accent-violet-bg: rgba(167, 139, 250, 0.08);

  /* Accent - Rose */
  --accent-rose: #f472b6;
  --accent-rose-muted: rgba(244, 114, 182, 0.15);
  --accent-rose-bg: rgba(244, 114, 182, 0.08);

  /* Semantic - Feedback */
  --color-success: #4ade80;
  --color-success-muted: rgba(74, 222, 128, 0.15);
  --color-warning: #fbbf24;
  --color-warning-muted: rgba(251, 191, 36, 0.15);
  --color-error: #f87171;
  --color-error-muted: rgba(248, 113, 113, 0.15);
  --color-info: #60a5fa;
  --color-info-muted: rgba(96, 165, 250, 0.15);

  /* Borders */
  --border-subtle: rgba(255, 255, 255, 0.05);
  --border-medium: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.14);

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-card: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 24px var(--accent-primary-glow);
}

/* ============================================
   Light Theme
   ============================================ */
[data-theme="light"] {
  /* Surfaces */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-elevated: #ffffff;
  --bg-code: #f4f4f5;

  /* Text Hierarchy */
  --text-primary: #0f172a;
  --text-secondary: rgba(15, 23, 42, 0.75);
  --text-tertiary: rgba(15, 23, 42, 0.62); /* Improved from 0.55 for WCAG AA contrast */
  --text-muted: rgba(15, 23, 42, 0.35);

  /* Brand - Primary (Warm Orange) */
  --accent-primary: #ea580c;
  --accent-primary-hover: #c2410c;
  --accent-primary-muted: rgba(234, 88, 12, 0.1);
  --accent-primary-glow: rgba(234, 88, 12, 0.06);

  /* Brand - Secondary (Cool Blue) */
  --accent-cool: #2563eb;
  --accent-cool-hover: #1d4ed8;
  --accent-cool-muted: rgba(37, 99, 235, 0.1);

  /* Accent - Violet */
  --accent-violet: #7c3aed;
  --accent-violet-muted: rgba(124, 58, 237, 0.1);
  --accent-violet-bg: rgba(124, 58, 237, 0.05);

  /* Accent - Rose */
  --accent-rose: #db2777;
  --accent-rose-muted: rgba(219, 39, 119, 0.1);
  --accent-rose-bg: rgba(219, 39, 119, 0.05);

  /* Semantic - Feedback */
  --color-success: #16a34a;
  --color-success-muted: rgba(22, 163, 74, 0.1);
  --color-warning: #d97706;
  --color-warning-muted: rgba(217, 119, 6, 0.1);
  --color-error: #dc2626;
  --color-error-muted: rgba(220, 38, 38, 0.1);
  --color-info: #2563eb;
  --color-info-muted: rgba(37, 99, 235, 0.1);

  /* Borders */
  --border-subtle: rgba(0, 0, 0, 0.05);
  --border-medium: rgba(0, 0, 0, 0.1);
  --border-strong: rgba(0, 0, 0, 0.15);

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-card: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-glow: 0 0 24px var(--accent-primary-glow);
}

/* ============================================
   Responsive Adjustments
   ============================================ */
@media (max-width: 768px) {
  :root {
    --container-padding: var(--space-4);
  }
}

@media (max-width: 640px) {
  :root {
    --text-4xl: 2rem;
    --text-5xl: 2.5rem;
    --text-6xl: 3rem;
    --text-7xl: 3.5rem;
  }
}